Situation: we have a problem to install office. No matter we install it from office 365 website or Office Development Tool (ODT), it takes a long time, sometimes take 24 hours.
Troubleshooting: I find our firewall block office 365 IP which is located in Hong Kong. Please refer to this post:
How to check an IP Address location in Paloalto firewall?
If I add the IP address to the firewall, it jumps to another foreigner IP address which we block. Refer to this how to.
How to allow access foreign IP address in Palo Alto Firewall
If I add office.com to the URL allow policy. that doesn’t fix the problem.
Finally, we find the resolution from Microsoft:
We need to add the URL’s under Microsoft 365 common and office online. Under the article which I have shared add the URL’s with ID no 78.80,81,83,84,86,87,88,89. Also the port number 443 and 80. Please let me see if you can see changes after that.
That fixes the problem.
Please view this step by step video:
